[time-nuts] End of Range Oscilloquartz 8600-3

[paul swed]

As much as the pictures are interesting the sites blasting out crazy
amounts of ads
Totally a problem. Touch anyone of them and off you go to whatever it was.
Regards
Paul
WB8TSL

On Tue, Dec 12, 2017 at 12:32 PM, Ed Palmer <ed_palmer at sasktel.net> wrote:

> It sounds like yours is different from my 8601.  How old is yours? From
> the label inside it looks like mine is from 1983.
>
> Internal pictures are here:
>
> http://s701.photobucket.com/user/edpalmer42/library/Oscilloq
> uartz%208601%20Oscillator
>
> If you click on 'view as story' you'll see some comments that I added to
> the pictures.
>
> Ed
>
>
> On 2017-12-12 11:00 AM, <ulf_r_k at yahoo.com>  wrote:
>
>> Emailed Oscilloquartz that now has another name: Advaoptical... This in
>> my capacity as aresearch engineer at Onsala Space Observatory.And the
>> oscillator is at my work bench. Nothingprivate/hobby about this.
>> The answer was that since we do not have a service agreement,they would
>> not disclose any information.
>> (Compare this with Keysight who has a free downlad area for oldmanuals.
>> IMO the Keysight approach benifits their businessin the long term).
>> So...
>> I went along and started to dissassemble the 8600-3.
>> The outer case was easy. Inside is a PCB with RF buffersand temperature
>> regulation circuitry.
>> Then there is a thermo bottle with the ovenized oscillator.This unit is
>> connected to the PCB using two flex cables.
>> The oscillator unit can simply be extracted from thebottle using an
>> Metric 3 mm screw lightly screwed inone of the holes in the oscillator
>> assembly.
>> The assembly can be accessed by carfully unscrewingthe flex-cable end
>> from the other mechanics. No needto touch the three small screws at the lid.
>> Now it is starting to get intersting. I have not foundthe RF wiring into
>> the crystal. The PCB in this unitseems to deal only with temperature
>> regulation.Possibly, the RF is routed together with some heaterwinding.
>> Or the crystal and the oscillator parts is sealedin such a way that there
>> will be no wayto dissassemble it. There are several thermistorsglued inside
>> to various parts of the oscillator/ovenassembly. That will make any further
>> attemptsdifficult as the connecting wires are thin and delicateif they
>> needs to be unsoldered.
>> The construction is a nice piece of engineering.I'll give them that.
>> Right now, I cannot see any typical oscillatorcircuitry (pF, nH, RF
>> transistors) etc.
>> I think I'll contemplate on the next movefor a day or so...
>>
>> Ulf Kylenfall
>>
>>
>>
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